Adjustable limit-gage



F. H. DANIELS.

ADJUSTABLE LIMIT GAGE.

APPLICATION FILED IUNES. I9I9. 1,367,537, f Patented Feb..8.,1921.

d /JVIILV @Y UNITED STATES iJTENT OFFCE.

FRANK H. DANIELS, OF PHILADELPHIA, l-NNSYLVANIA., ASSIGNOR TO JOHN M. ROGERS WORKS, ING., OF GLOUCESTER CIL'TY, NEW" JERSEY, A CORPORATION OF NEW JERSEY.

ADJSTABLE LIMTGAGE.

Application nieu June 5, 1919.

To all collo/rz, it .may concern:

Be it known that l, FRANK H. DANIELS, a citizen oil the United States, residing at .l,)hiladelphia, county oi" Philadelphia, and State of Pennsylvania, have inif'ented a new and useful Improvement in Adjustable Limit-Gages, oli' which the vfollowing is a tull, clear, and exact description, reference heilig had to the accompanying drawings, which form a part oi this specication.

A well known form of adjustable limit gage comprises a yoke, two axially adjustable pins on the inside of one arm of the yoke and opposing similar pins on the `other arm of the yoke. These pins are so adjust ed that two opposing pins measure a distance slightly exceeding the desired measurement of the work, while the other pair of pins measures a distance slightly less than the desired measurement of the worl Gages may also be made with a single pair of adjustable pins, one at one end of the yoke, the opposing one at the other end of the yoke. One or both pins of a pair may be made adjustable.

lt is necessary, after the pins are adjusted, that they should be restrained from the slightest movement in an axial direction. lt is also desirable that the adjustment should not be effected by turning the pins in their sockets, because, if the end faces of the pins are not exactly at right angles with their axes or if the axes of the two bolts are not precisely coincident, the turning or' the pins will destroy the exactitude of the gage.

The object of the invention is to provide means 'or secure-ly locking the gage pins in their adjusted positions while preventing any substantial turning movement of the pins Figure l is a front elevation oi" the tool.

Fig. 2 is a side view of one oi the heads of the yoke and the pins and adjusting means carried thereby.

Fig. 3 is a cross-section on line 3 of Fig. 2.

Fig. 4. is a section on line 4.-4, Fig. 2.

The yoke f1, is provided with two sockets in each end head for the reception of the pins y'. Each pin projects beyond the inner end oi the socket and terminates short of the other or outer end of the socket. The

Specification of Letters Patent,

Patented Feb. 8, 1921.

serial No. 301,868.

outer end el? the socket is somewhat enlarged and is internally threaded for the reception of an adjusting screw c, which abuts against the pin y'. Each pin is provided with a groove d whose side walls are parallel to a radius of the pin. Inset in the frame of the yoke are two push rods it, 7L, which extend at right angles to the pins and are provided on their ends with projections 2, z', which. enter grooves d in the pins. The outer side of one of the pin sockets is cut away to allow the insertion, in a lateral direction, of the push rods before the insertion oi' the pins, the hole being afterward closedlby a plug L". After the pins are adjusted, which is accomplished by manipula tion oit adjusting screws c, a tapered plug or wedge m is :forced between the. two push rods il, la. thus forcing the push rods apart and tightly against the bases of the grooves oi the pins7 whereby the pins are held from movement in either an axial or rotary direction. The yoke head is provided with a hole in which is threaded a screw n, by turning which the plug m is operated and retained.

To avoid tampering with the tool to change its adjustment, the recess in the threaded end of a pin socket may be sealed by suitable material.

l am aware that it is old to provide a single clamping member having beveled corners which engage flattened peripheral portions ot the two pins of a pair. This construction requires extreme accuracy in that the failure of such member to exactly Alit the socket or the failure of the two beveled corners to coincidently engage the two ilattened surfaces of the pins, or any departure from exact parallelism between the bevels of said member and the liet-tened faces of the pins, will result in failure to bind one of the pins in its socket or permit a. limited turning movement thereof. My construction, wherein there are two independent clamping members 7L, one for each recess, is particularly not dependent upon accuracy of construction for propo' operation, in that the lengths of the two members may be both variable and unequal, the wedge m being capable of being screwed in to a variable extent and being capable also of sidewise displacement, to the degree required to cause the projections of members h to be pressed tightly into the grooves of the pins.

Ylaving now fully described my invention, what I claim and desire to protect by Letters Patent is:

l. in an adjustable limit gage, the combination with a holding trame having two spaced apart sockets, ci' gage pins, two independently mcvable clamping members located between the gage pins and extending substantially at right angles thereto, and common actuating means to force said clamping inen'ibers bodily away from each other into clamping engagement with their respective pins.

2. ln an adjustable limit gage, the combination with a holding frame having two spaced apart sockets,y oi' gage pins in the socket-s provided with longitudinal grooves facing toward each other, independently movable clamping means having projections extending into said grooves and means extending between said clamping members adapted to force them bodily in opposite directions into clamping engagement with their respective pins.

3. In an adjustable limit gage, the combination with a holding frame having two spaced apart sockets, oi gage pins, tivo spaced apart bodily movable clamping members, located between the gage pins and extending substantially at right angles thereto, a wedge located between the clamping members and a screw by which the wedge is actuated to engage -both clamping members and move them, in the direction ot their extension, into clamping relation with the respective pins.

4. In an adjustable limit gage, the combination with a holding frame having a socket7 oi a gage pin adjustable in the socket in the direction of its axis, a clamping member, within the trame and extending substantially at right angles to the axis ot' the pin, said member being bodily movable toward the axis of the soc-liet to effect a binding engagement with the pin, whereby lateral pressure is exerted on the pin to bind it in the socket and prevent it from moving.

ln testimony of which invention, I have hereunto set my hand, at Gloucester, N. J., on this third day of June, 1919.

FRANK H. DANIELS. 

